Patent GB-190615554-A (GB)
Title: Improvements in Machines for Grinding Inner Surfaces particularly of the Necks of Bottles
Inventor: CONRADSON CONRAD MARTINIUS
Filed: 1906-07-09
Granted: 1907-03-07
Abstract: 15,554. Conradson, C. M. July 9. Enlarging and trueing round holes; boring and drilling.-In machines for grinding or reaming inner surfaces, particularly the conical necks of glass bottles to form seats for glass stoppers, a number of rotating tools of pencil shape are mounted in an inclined position on a slide and automatically reciprocated longitudinally ; an equal number of bottles being held on a slide on a slide-rest movable transversely to the direction of reciprocation of the tools, to adjust the work with reference to the tools and to take :it out of engagement with them when it is desired to remove the bottles. The tools 19, Fig. 2, are mounted in chucks 18 carried by spindles 16 revolving in frames 15 carried on a table 14, which is reciprocated on ways 13 on the sides of the frames 11 by eccentrics 21 on the shaft 20. The rods 23, connecting these eccentrics to the table 14, are attached to eccentrics on a shaft 24 carried in bearings 25 attached to the table. This shaft can be rotated by a worm 28 operated by a hand-wheel 29, and its rotation alters the length of the path of the tools so that they may be advanced to their work as they wear. The tools, which are of pencil shape and are placed in an inclined position so that the working face is in the line of reciprocation, are driven by bands 17. The work-holders are mounted on a slide 50 adjustable by a screw 53 with reference to a slide-rest which is reciprocated transversely across the frame by a rocking lever 32 operated by a cam 36 driven by worm gearing from the shaft 20. The workholder is shown in section in Figs. 4 and 7. The body portion 82 of the work holder spindle rotates in ball bearings carried by the uprights 76, 77, and is driven through a clutch 92 by a belt over a pulley 90 loose on the spindle. A block 93, having longitudinal grooves 94, slides within the hollow spindle 82, and blocks 95, attached to the clutch member 92 and passing through slots in the spindle 82, engage with these grooves. Springs 99 tend to keep the clutch in engagement with the pulley. Pins 97 on the clutch member 92 pass through slots 98 in the spindle 82 and engage the block 93. The clutch is operated by a lever 101 having a handle 106 pivoted at 102 to the base of the support. Pins on the lever 101 engage in a groove running round the clutch member 92. As the handle 106 is moved over to the right to disengage the clutch, the piece 93 is moved with it through the pins 97. Springs 111 in the grooves in the block normally press the piece 93 in this direction. The piece 93 carries oblique arms 118, Fig. 7, which are connected by a ring 120 and engage with the jaws 115 of the chuck. The motion of the handle 106 in one direction therefore causes the jaws of the chuck to expand to release the bottle, and in the other direction causes the chuck to contract and grip the work. It also allows a spring-pressed friction block 121 carried on the end of a pivoted arm 122, to descend and brake the spindle so as to stop its rotation. When the grinding is completed, the cam 36 moves the slide-rest carrying the slide 50 on which the work-holders are fixed, so that the grinding-tools occupy a central position in the bottle necks. At the same time, a belt-shipper 141 moves the driving-belt on to the loose pulley 47. This shipper is operated through a pivoted lever 142 by a finger 146 on the shaft 38 engaging with one arm 145 of a bell-crank, the other arm 144 of which engages with the end of the lever 142. The mechanism is started again by moving the handle 147 to shift the belt on to the fast pulley 46.